SMC10 Smart Mitigation Cell

SMC10 is a Smart Mitigation Cell which allows controlled DC current drain to ground in the situations where AC, DC interference  or telluric effect cause over protection on a cathodically protected structure.

The structure to reference value is constantly compared to the desired set value by monitoring a reference electrode. When the reference value exceeds the set value, SMC10 drains appropriate current to the ground so that the protection potential is exactly at the desired point. Variable Resistance Grounding provides precise adjustment of the drained current within a very large range. SMC10 drains AC interferences directly to ground continuously to minimize the AC influence on the protection. SMC10 can also be used to drain excessive current caused by large AC interference between Anode to Cathode connections of the CP rectifiers.

SMC10 becomes open-circuit for the DC currents when the protection potential is below the desired point and behaves in just the same manner as a normal polarization cell.

SMC10 includes an industry standard RS485 MODBUS port for connection to SCADA systems. AC, DC currents, Reference to Structure potentials can be monitored over SCADA.

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Technical Specifications

Supply Voltage Range 12- 50 VDC
Reverse Polarity Protection Var
Operating Temperature Range -20, +50C
Continuous AC Current 20A
Continuous DC Current 10A
AC Fault Current (0.1 sec) 500A
Internal Impedance (AC) 40mOhm
Internal Impedance Range(DC) 0.1 Ohm – 100kOhm
Structure to Earth Treshold 1.3V
Analog Input 1 Bipolar
Analog Input Voltage Range ±10V
Input Impedance 10MOhm
Galvanic Isolation 2500V AC 1 min
LCD Display 3 Lines, total 48 Characters
Information Shown on Display Reference to Structure Set Value, Reference to Structure DC value, Reference to Structure AC Value, Drained AC Current, Drained DC Current, Modbus ID
Reference to Structure Voltage Adjustment Range 800-1600mV
Over Temperature Protection
Scada RS485 Modbus RTU